"suspicious minds" wrote
I think that you will find that aerobic composting produces heat (oxygen
is good) and that you need a critical mass of sh*t before a heap will
generate heat.
A Metre cubed is often mentioned.
It also needs some moisture to work and the dry year down here has caused
some heaps to stop rotting and dry out.

--
Regards
Bob H
17mls W. of London.UK